Improved boiler for steam-heating



l Usurnn Srnrns Paritair' @trims-.f

HENRY `HONVVARD, OF VESTFIELD., MASSACHUSETTS.

iMPROVED BOILER FOR STEAM-HEATING.

Specillicaton forming part of Letters Patent No 4&067. dated .linne (i,18d?.

T0 all whom, t may concern.-

Be it known that I, HENRY Hownn'n, of Vestiield, in the county ofHampden and State .of Massachusetts, have invented a new and ImprovedBoiler for Heating Vater and Generating Steam, which is more especiallydesigned for warming purposes; and Ido hereby declare that the followingis a full, clear, and 'exact description thereof, reference being had tothe accompanying drawings, forming a part of this specification, inwhich- Figure l is a side elevation of one of my improved steam-boilers,the side of the furnace being removed to show the position andarrangement of the boiler therein. Fig. 2 is a vertical section throughthe boiler-in the line .r m of Fig. l. Fig. 3is asimilar section,showing `the manner of combining two or more of my improved boilerstogether within one furnace; and Fig. 4 is a top view of two oftheboilers combined, illust-rating more clearly the manner of connectingthem.

Similar letters indicate like parts in all of the figures. Y

The nature of my invention consists of a boiler for heating water andgenerating steam, so formed and constructed as that its sides, whenplaced against the corresponding sides of similar boilers or against theperpendicular plain wall of an inclosingfurnace, shall constitute, incombination therewith, (and partially embrace) two or more longitudinalflues to conduct the iiame and heat of the fire backward and forwardover nearly the entire exterior surface of the boiler. I have sought bythis invention to produce very cheaply edicient boilers, which may notonly be used singly, but may be also readily combined with each other inone furnace, as a greater or less extentof boiler-surface is required,the peculiarity of their form being such as that each individual boiler,used either independently or as one of a series, shall, when properlyset, be encompassed by a flue passing over nearly its entire surface.

The Igeneral shape of my improved boiler A is that of a longparallelogram, and its conguration is shown by the side elevationthereof in Fig. l and the vertical section in Fig. 2 of the drawings. Itmaybe economically cast in one piece upon a suitable core, or it may beibrmed of rolled iron plates properly riveted together.

When cast, the core is removed through pipe-holes B and'C, formed inthesides of the boiler, in its upper and lower front corners. rlhe`parallel recesses a and b, which eX- tend longitudinally along thesides of the boiler, as seen in the drawings, form fluespaces for thevpassage of the heat and iiame from the fire. Thenarrow flanges c c,which project beyond the sides of the boiler, serve as partitionsbetween the lues, dividing them from each other, and which, bypreventing the direct upward passage of the heated air from the furnace,cause it to sweep in a current backward and forwardover the sides andends of the boiler from the bottom to the top thereof, as indicated bythe arrows in Fig. 1. Vhen one boiler only is used, these flanges c crest closely against the sides of the furnace, as seen in Fig. 2. Platesd cl may be inserted in the brick wall and received into grooves formedin the anges c c, so as to form a more close joint therewith, ifdesired. Vhen :an increased water-heating surface is desired, it is onlynecessary to place two or more of these boilers side by side within asuitable furnace, the entire number required being cast from the samepattern. Vhen so placed, the flanges c c, coming in contact with eachother, complete the iiues c c and b b, as illustrated by Fig. 3, thejoints between the anges being closed with any cheap iron cement.Vertical ilanges e e., placed at the rear ends of the lowerflue-recesses, a a, divert the iiame down, so as that it shall passunder the lower rear end of the boiler, as seen in Fig. l, and also forma pocket in this lower fiue to concentrate, to a certain extent, theheat ofthe fire at this point.

rlhe pipe-apertures B and C are formed through bosses so cast as to givethe thickness required to obtain a good screw-seat for the ends of thewater and steam pipes to be coni nectcd with the boiler. Thewater-supply pipe E, (red lines, Figs. 2 and 3,) connected with the mainreservoir, is attached to the lower pipe-aperture, B, upon one side ofthe boiler, and the pipe F, returning the condensed steam from theradiators, (where the boilers are used for warming purposes,) isconnected to the lower aperture, B, upon the other side of the boiler.The main steam-pipe G is con nected to the upper aperture, C', oftheboiler upon the same side as the condensing-pipe F,

while a pipe, H, connecting with a Suitable automatic fire-regulator,(Clarks.patent,) is attached to the opposite aperture, C.

Vhere two or more boilers are used in combination, as shown in Figs. 3and 4, they are connected by means of suitable pipes, K K, Fig. 4L,placed between the opposite adjacent pipe-apertures above and below,(see the red dotted lines in Fig. 8,) so that the water and steam maypass freely from one boiler to the other.

The boiler A, Figs. 1 and 2, (or the series of connected boilers A A A,Fig. 8,) are supported in the furnace D by means of projections S S.cast upon the front and rear ends of the boiler, as seen in Fig. l.These projections rest upon bars V WV, inserted in the front and rearwalls of the furnace, and are pierced with apertures, through which abolt may be passed for additional security.

It will be observed that the direct and more intense heat of the re isexerted upon the cold water entering thelower part of the boiler, andthat the current of `heat (gradually losing its intensity) passesthrough the upper iiue around the steam-space in the upper part of theboiler, so as to superheatthe steam formed therein. The current of heatin passing over the boiler strikes more directly against the roof of thefurnace, so as not to effect the top plate, although it serves still tokeep it properly heated.

Having thus fully described iny invention, what I claim therein as new,and desire to secure by Letters Patent, is-

The boiler A, for heating water and genen ating steam, when formed,constructed, and arranged substantially in the manner herein set forth.

HENRY HOXVARD.

Vitnesses:

DAVID A. BURR, RANDOLPH CoYLn, Jr.

